Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Patent
1995-11-30
1998-01-27
Caldarola, Glenn A.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
502349, 502351, B01J 2310
Patent
active
057122180
ABSTRACT:
Cerium/zirconium mixed oxides (optionally including yttrium values), comprising solid solutions thereof, having contents of zirconium of up to 60 atom % and having thermally stable, very high specific surface areas at least greater than 80 m.sup.2 /g, preferably at least 100 m.sup.2 /g and more preferably at least 150 m.sup.2 /g, are well suited as catalysts and/or catalyst supports, notably for the treatment/conversion of vehicular exhaust gases; such Ce.sub.x Zr.sub.1-x O.sub.2 particulates are conveniently prepared by thermally treating an aqueous solution of soluble compounds of cerium and zirconium (and optionally yttrium), e.g. the nitrates thereof, present in the desired stoichiometric amounts, and thence recovering and, if appropriate, calcining the reaction product thus formed.
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Chopin Thierry
Touret Olivier
Caldarola Glenn A.
Rhone-Poulenc Chimie
Yildirim Bekir L.
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